Kyushu University Academic Staff Educational and Research Activities Database
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Koki Aizawa Last modified date:2017.04.21

Associate Professor / Seismology and Volcanology
Institute of Seismology and Volcanology
Faculty of Sciences

Graduate School
Undergraduate School
Other Organization

Academic Degree
Field of Specialization
Research Interests
  • Electromagnetic signals by a volcanic lightning
    keyword : volcanic lightning
  • Relationship between resistivity structure and earthquakes
    keyword : resistivity earthquakes
  • Temporal change of resistivity structure
    keyword : resistivity magnetotellurics structure change
  • hydrothermal system of volcanoes
    keyword : self-potential resistivity hydrothermal system
  • Resistivity structure beneath active volcanoes
    keyword : Resistivity magnetotellurics
Academic Activities
1. , [URL].
2. , [URL].
3. Aizawa Koki, C. Cimarelli, M. A. Alatorre-Ibargüengoitia, A. Yokoo, D. B. Dingwell, M. Iguchi, Physical properties of volcanic lightning: constraints from magnetotelluric and video observations at Sakurajima volcano, Japan, Earth and Planetary Science Letters, 444, 2016.06, [URL].
4. Aizawa Koki, H. Sumino, M. Uyeshima, Y. Yamaya, H. Hase, H. A. Takahashi, M. Takahashi, K. Kazahaya, Masao OHNO, T. Rung-Arunwan, Y. Ogawa, Gas pathways and remotely triggered earthquakes beneath Mt. Fuji, Japan, Geology, 44, 2016.02, [URL].
5. Aizawa Koki, T. Koyama, H. Hase, M. Uyeshima, W. Kanda, M. Utsusgi, R. Yoshimura, Y. Yamaya, T. Hashimoto, K. Yamazaki, S. Komatsu, A. Watanabe, K. Miyakawa, Y. Ogawa, Three-dimensional resistivity structure and magma plumbing system of the Kirishima Volcanoes as inferred from broadband magnetotelluric data, J. Geophys. Res. Solid Earth, 119, 1, 198-215, 2014.01, [URL].
6. Aizawa Koki, T. Koyama, M. Uyeshima, H. Hase, T. Hashimoto, W. Kanda, R. Yoshimura, M. Utsugi, Y. Ogawa, K. Yamazaki, Magnetotelluric and temperature monitoring after the 2011 sub-Plinian eruptions of Shinmoe-dake volcano, Earth Planets Space, 65, 6, 2013.07, [URL].
7. Aizawa Koki, Kanda W., Ogawa Y., Iguchi M., Yokoo A., Yakiwara H., Sugano T., Temporal changes in electrical resistivity at Sakurajima volcano from continuous magnetotelluric observations, Journal of Volcanology and Geothermal Research, 199, 1-2, 165-175, 2011.01, [URL].
8. Aizawa Koki, Yokoo A., Kanda W., Ogawa Y., Iguchi M., Magnetotelluric pulses generated by volcanic lightning at Sakurajima volcano, Japan, Geophysical Research Letters, 37, L17301, 2010.09, [URL].
9. Aizawa Koki, Ogawa Y., Mishina M., Takahashi K., Nagaoka S., Takagi N., Sakanaka S., Miura T., Structural controls on the 1998 volcanic unrest at Iwate volcano: Relationship between a shallow, electrically resistive body and the possible ascent route of magmatic fluid, Journal of Volcanology and Geothermal Research, 187, 1-2, 131-139, 2009.10, [URL].
10. Aizawa Koki, Ogawa Y., Ishido T., Groundwater flow and hydrothermal systems within volcanic edifices: Delineation by electric self-potential and magnetotellurics, Journal of Geophysical Research, 114, B01208, 2009.01, [URL].
11. Aizawa Koki, Classification of self-potential anomalies on volcanoes and possible interpretations for their subsurface structure, Journal of Volcanology and Geothermal Research, 175, 3, 253-268, 2008.08, [URL].
12. Aizawa Koki, Ogawa Y., Hashimoto T., Koyama T., Kanda W., Yamaya Y., Mishina M., Kagiyama T., Shallow resistivity structure of Asama Volcano and its implications for magma ascent process in the 2004 eruption, Journal of Volcanology and Geothermal Research, 173, 3-4, 165-177, 2008.06, [URL].
13. Aizawa Koki, Uyeshima M., Nogami K., Zeta potential estimation of volcanic rocks on 11 island arc-type volcanoes in Japan: Implication for the generation of local self-potential anomalies, Journal of Geophysical Research, 113, B2, B02201, 2008.02, [URL].
14. Aizawa Koki, Yoshimura, R., Oshiman, N., Yamazaki, K., Uto, T., Ogawa, Y., Tank, S. B., Kanda, W., Sakanaka, S., Furukawa, Y., Hashimoto, T., Uyeshima, M., Ogawa, T., Shiozaki, I., Hurst, A. W., Hydrothermal system beneath Mt. Fuji volcano inferred from magnetotellurics and electric self-potential, Earth and Planetary Science Letters, 235, 1-2, 343-355, 2005.06, [URL].
15. Aizawa Koki, Yoshimura R., Oshiman N., Splitting of the Philippine Sea Plate and a magma chamber beneath Mt. Fuji, Geophysical Research Letters, 31, 9, L09603, 2004.05, [URL].
16. Aizawa Koki, A Large Self-potential Anomaly and its Changes on the Quiet Mt. Fuji, Japan, Geophysical Research Letters, 31, No. 5, L05612, 2004.03, [URL].
1. , [URL].
2. Koki Aizawa, Takao Koyama, Hideaki Hase, Makoto Uyeshima, Magnetotelluric monitoring at Sakurajima volcano, Japan, IAVCEI 2013 Scientific Assembly, 2013.07.23.
3. Koki Aizawa, et al., Three dimensional resistivity structure of Kirishima volcanoes inferred from magnetotelluric data, IAVCEI 2013 Scientific Assembly, 2013.07.21.
Membership in Academic Society
  • The seismological society of japan
  • AGU
  • The volcanological society of Japan
  • sgepss